Default Bugs after CM11-20140415

I'm trying new nightlys 2 or 3 times a week on my I9300, but this time i have some bugs.
I was on the the CM11-20140412 and everything was working, but this morning i tried the 20140415 release.

I have the following bugs:
- Home button doesn't work anymore
- I haven't notifications, juste the sound of new notifications
- I can't lock my phone whith PIN Code, when my phone start it asks the sim card pin code and an other pin code to unlock the phones.
But after this, when i push the power button to go to lockscreen it doesn't ask my any code.

I tried this:
- Go back the 20140412 release ===> KO, same bugs
- Wipe cache&Dalvik ==> KO, same bugs
- Go back to M5 Snapshot, KO, same bugs
- Go back to M4 Snapshot (which was the most stable nightly in my opinion) => KO, a lot of "force close"
- Now i'm back on the 20140412 nightly


Can you help me ? I guess i have to try a factory reset, but first do you any advices ?